Nouns denoting natural phenomena

hot weather
a period of unusually high temperatures
 
harvest
the consequence of an effort or activity
 
tossup
an unpredictable phenomenon
 
delta wave
the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
 
overpressure
a transient air pressure greater than the surrounding atmospheric pressure
 
afterglow
a glow sometimes seen in the sky after sunset
 
systolic pressure
the blood pressure (as measured by a sphygmomanometer) during the contraction of the left ventricle of the heart
 
placebo effect
any effect that seems to be a consequence of administering a placebo; the change is usually beneficial and is assumed result from the person's faith in the treatment or preconceptions about what the experimental drug was supposed to do; pharmacologists were the first to talk about placebo effects but now the idea has been generalized to many situations having nothing to do with drugs
 
brisance
the shattering or crushing effect of a sudden release of energy as in an explosion
 
ultraviolet spectrum
the spectrum of ultraviolet radiation
 
myonecrosis
localized death of muscle cell fibers
 
shaft
a column of light (as from a beacon)
 
aerodynamic force
forces acting on airfoils in motion relative to the air (or other gaseous fluids)
 
capacitance
an electrical phenomenon whereby an electric charge is stored
 
overstrain
too much strain
 
radiant energy
energy that is transmitted in the form of (electromagnetic) radiation; energy that exists in the absence of matter
 
depolarisation
a loss of polarity or polarization
 
weak interaction
(physics) an interaction between elementary particles involving neutrinos or antineutrinos that is responsible for certain kinds of radioactive decay; mediated by intermediate vector bosons
 
catabatic wind
a wind caused by the downward motion of cold air
 
sympathetic vibration
(physics) vibration produced by resonance
 
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